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arXiv 1111.5402hep-phhep-thnucl-th
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相对论重离子碰撞中夸克对Z(3)壁和弦的形成和演化的影响

Effects of quarks on the formation and evolution of Z(3) walls and strings in relativistic heavy-ion collisions

Uma Shankar Gupta, Ranjita K. Mohapatra, Ajit M. Srivastava, Vivek K. Tiwari

摘要:

在Polyakov圈模型中,研究了由于动力学夸克的存在而导致的Z(3)对称性的显式破缺对Z(3)壁和相关QGP弦的形成和演化的影响.在相对论性重离子碰撞实验中,我们对一阶夸克-强子相变通过泡形核(例如在有限重子化学势下)进行了数值模拟.通过适当地移动Polyakov圈有效势中的序参量,我们用反弹技术计算了真真空和亚稳Z(3)真空的气泡轮廓,并估计了相关的成核几率。这些不同的气泡然后成核和演化,并由此产生的Z(3)壁和QGP弦的形成和动力学进行了研究。我们讨论了这些Z(3)界面和QGP弦存在的各种含义,特别是考虑到Z(3)对称性的显式破缺对这些物体的形成和动力学演化的影响。

英文摘要:

We investigate the effects of explicit breaking of Z(3) symmetry due to the presence of dynamical quarks on the formation and evolution of Z(3) walls and associated QGP strings within Polyakov loop model. We carry out numerical simulations of the first order quark-hadron phase transition via bubble nucleation (which may be appropriate, for example, at finite baryon chemical potential) in the context of relativistic heavy-ion collision experiments. Using appropriate shifting of the order parameter in the Polyakov loop effective potential, we calculate the bubble profiles using bounce technique, for the true vacuum as well as for the metastable Z(3) vacua, and estimate the associated nucleation probabilities. These different bubbles are then nucleated and evolved and resulting formation and dynamics of Z(3) walls and QGP strings is studied. We discuss various implications of the existence of these Z(3) interfaces and the QGP strings, especially in view of the effects of the explicit breaking of the Z(3) symmetry on the formation and dynamical evolution of these objects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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